Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\ConfigurationInterface' not found in /home/likach/contao44.lika.ch/vendor/lexik/maintenance-bundle/DependencyInjection/Configuration.php:16 Stack trace: #0 {main} thrown in /home/likach/contao44.lika.ch/vendor/lexik/maintenance-bundle/DependencyInjection/Configuration.php on line 16